New font information requests are needed. A request to query the metrics for a list of glyphs along with a new font listing function which provides as much information about the font as can be gathered without rasterizing every glyph.

• 设计新的字体信息请求是必要的。一个查询一列字形的请求外加一个字体查询函数，该函数可以在不光栅化字体的每个字形的前提下提供尽可能多的字体信息。